Trouble Shooting Guide
DISCONNECT AND LOCKOUT ELECTRICAL
WARNING
POWER BEFORE ATTEMPTING ANY
Hazardous
MAINTENANCE. FAILURE TO DO SO CAN CAUSE
voltage
SHOCK, BURNS, OR DEATH.
SYMPTOM
MOTOR NOT RUNNING
See Probable Cause – 1 through 5
LITTLE OR NO LIQUID DELIVERED BY PUMP
See Probable Cause – 6 through 12
POWER CONSUMPTION TOO HIGH
See Probable Cause – 3, 12, 13, 15
EXCESSIVE NOISE AND VIBRATION
See Probable Cause – 3, 6 - 8, 10, 12, 13, 16
PROBABLE CAUSE
1. Motor thermal protector tripped
2. Open circuit breaker or blown fuse
3. Impellers binding
4. Motor improperly wired
5. Defective motor
6. Pump is not primed, air or gases in liquid
7. Discharge, suction plugged or valve closed
8. Incorrect rotation (three phase only)
9. Low voltage or phase loss
10. Impellers worn or plugged
11. System head too high
12. NPSH
too low – excessive suction lift or losses
A
13. Discharge head too low – excessive flow rate
14. Fluid viscosity, specific gravity too high
15. Worn bearing
16. Pump, motor or piping loose
14